<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>使用js创建虚拟DOM</title>
</head>
<body>
  <!-- 准备容器 -->
  <div id="test"></div>
  <!-- 按照顺序引入 -->
  <script type="text/javascript" src="../../js/react.development.js"></script>
  <script type="text/javascript" src="../../js/react-dom.development.js"></script>
  <script type="text/javascript" > 
  // 1、创建虚拟dom  使用js创建虚拟dom  如果有多层标签嵌套  代码结构会比较复杂  可读性差
  // document.createElement() 创建真实dom
  // React.createElement(标签名，{标签属性}，标签内容) 创建虚拟dom
  // const VDOM = React.createElement('h1',{id:'title'},'hello,React')
  const VDOM = React.createElement('h1',{id:'title'},React.createElement('span',{},'hello,React'))
  // 2、渲染虚拟dom到页面 ReactDOM.render(虚拟DOM，容器)
  ReactDOM.render(VDOM,document.getElementById('test'))
  </script>
</body>
</html>